Multistage 2µm polarization-maintaining single clad Tm-doped fiber amplifier

2 μm high power and high performance amplifiers are needed for applications such as LIDAR, remote sensing, and WDM transmission systems. In this paper we report the experimental evaluation of the performance of multistage multiwatt optical amplifiers using a high performance PM single clad Tm-doped fiber. Our amplifier exhibits a large dynamic range ( > 25 dB), a saturated output power > 2 W at 1909 nm, an optical bandwidth from 1875 to 2000 nm, a low noise figure ( 50 dB), and a PER > 20 dB.